Earlier today i went to bid a tree job. It is a removal of 3 40 foot spruce trees. Fairly easy job, that also includes removing stumps and planting 3 news trees in place. About a month ago there was an accident on the street in front of her house, about 30ft away from the trees. The accident included a diesel spill from a tractor trailer, maybe 200 gallons i suspect. The home owner wants me to write an estimate for her insurance company stating that the fuel oil in the ground is killing the trees. I don't believe it though. The trees look healthy. The grass is green. I cant see anything that suggests the soil is contaminated. I told her to have a soil test because i don't want to plant new trees in bad soil. She kind of blew that off. I think she wants the trees gone on the ins. co. dime. Im looking for input. I think i would be lieing if i say the diesel oil is killing the trees. Any recommendations?